Products > Test Equipment
Rigol DP832 - Firmware list and bugs
frozenfrogz:
Did not want to necro the "bad design investigation" thread and ask here prior to opening a new thread in case I missed an old topic that already has the answers.
Channel 1 on my DP832 died. It just dropped to 0V and now stays that way. There was no magic smoke etc. and visual inspection does not give me any pointers so far.
1: Are there any schematics available that I missed?
2: Is this an issue that has been addressed and solved? (I found a mention of defective channel 1 in one of the postings, but there was a whole unit replacement without further investigation)
I had the unit working close to the max. voltage of 32V @50mA with a COB LED connected at the time when the channel simply died.
I would gladly take any pointers from you to save me some time poking around on the board!
_Wim_:
--- Quote from: frozenfrogz on October 30, 2019, 01:47:36 pm ---Did not want to necro the "bad design investigation" thread and ask here prior to opening a new thread in case I missed an old topic that already has the answers.
Channel 1 on my DP832 died. It just dropped to 0V and now stays that way. There was no magic smoke etc. and visual inspection does not give me any pointers so far.
1: Are there any schematics available that I missed?
2: Is this an issue that has been addressed and solved? (I found a mention of defective channel 1 in one of the postings, but there was a whole unit replacement without further investigation)
I had the unit working close to the max. voltage of 32V @50mA with a COB LED connected at the time when the channel simply died.
I would gladly take any pointers from you to save me some time poking around on the board!
--- End quote ---
No shematic that I know of, but it should be fairly easy to trace the signal back to the ouptput transisitors and check if these are ok. Does the unit give any errors itself? Does it show that the ouput is on?
frozenfrogz:
No error message of any kind. I can still configure the channel parameters as usual, only thing missing is output voltage.
_Wim_:
This gives you a little idea about the topology used, but it is not much.
For this kind of problem:
- check output transistors
- check power supply voltages
- check all opamps (opamp ok= zero voltage between inverting and non-inverting output). If not the case, start looking more in detai.
frozenfrogz:
Thanks! Will be a couple of days until I can get to this ("long weekend" duties ahead :)), but will keep you posted on my findings.
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